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Thread: A BASIC GUIDE TO CFL's

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    FZjb Guest

    Default A BASIC GUIDE TO CFL's

    CFL guide.

    Her's a quick guide to enlighten (grroooaannn) those that are new to growing and want some CFL info.

    IT IS NOT INTENDED TO CAUSE A FLAMING DEBATE ON HPS v CFL, IT IS HERE TO INFORM THOSE NEW TO GROWING OF A VIABLE ALTERNATIVE.


    CFL's - The General facts.


    CFL = Compact Flourescent Light

    They grow perfectly good MJ- quality IS comparable to Anything a hid can produce.

    Plants take longer to grow
    - Flowering time is increased by anything from 1 - 3 weeks (compared to hid -)

    Yeilds are decreased.
    This statement is slightly misleading, even tho yeilds are reduced compared to hid's, 0.5-1g per watt CAN be produced with

    a sea of green in a perpetual grow. either way buds can be big, tight, and potent. (strain & grow experience dependant of course) (tho not as

    tight as HPS, but as potent)

    Cfl's run cooler
    . this means that we can place them as close as 2-3cm from the canopy/margins, they require far less extraction power to keep

    the room cool, as much as 80% imo. (tho due to the nature of growing air movement/replacement IS required)

    Cfl's use less electricity.
    yes they do, but not much (5% watt for watt- i'm guessing here). and in cost watt for watt,its not much at all.


    why use CFLS?


    CFL's should be used for growing, when space or stealth becomes an issue or funds are lacking and light is needed to grow. Due to the thermal

    nature of these bulbs, they can be used in places that the hot lights cannot, spaces under 1.5m square can now be used for growing WITHOUT

    the need for expensive extraction and cooltubes.

    money issues. A CFL Grow can be up and running for under the price of a gram of weed! Yep, using the HOUSEHOLD CFL'S that YOU have, you can

    grow POTENT, MJ in a small box with just a few 20w CFLS and a couple of p.c fans. Now EVERYONE can grow MJ, yes even YOU, just browse our

    beginer topics here at THCtalk and grow some potent bud in no time (well.... 3 months ish from seed..), this was NOT as

    possible/viable/accesable just 10 years ago...

    Heat: worried about heat extraction? CFL's are very cool running (considering) and up to 250w of CFL can be safely used in a small space with

    just PC fans as extraction and circulation.

    Stealth. Got a spare chest of drawers? old wardrobe? turn it into a grow room! Cfls make this possible. with little extraction to worry

    about, PC fans run quetly in the background, of course, with canna there is SMELL, and some strains stink to high heavens, and no matter how

    stealthy you are. they give the game away.

    Space. like stealth, when space is an issue, cfls can be used as a viable way to grow in small spaces that need to be "closed" for one reason

    or another, or just because the space you have is no higher than 800mm (its possible to grow in a p.c case..)

    Supplimental lighting. CFL's are an Excelent source of lighting to ADD to a current HPS grow. thay can be added in all sorts of places to get

    that light right in there with awesome results.

    First time growing. Dont want to spend hundreds on that kit and find growing just isnt for you. start small and cheap with a CFL, and if you

    like it-work your way up- or not, whatever the case may be.




    Growin with CFL's.

    If your planning on using them then you need to know HOW to use them, as growing with CFL's requires some basic strategys.

    Keep Bulbs close: try and keep the bulbs as close to the foliage as possible. 20w CFL's can be as close as 1-2cm, 250W CFL's need to be

    between 2-5 inches from the canopy- MAX. this is WHY cfl's work so well. due to the square inverse law, we are losing MUCH MUCH less light

    than we would if the bulb was 18 inches from the plant. they (the CFL manufacturer's) spout 100% par too, whatever that means!

    Plants should be topped and or trained.
    although its possible to grow BIG main colas with buds 1 foot high and as fat as a fist, its

    EXTREMELY inneficient with cfl's, the main cola needs to be side lit at least on 1 side and turned at least daily- 180 degrees. its far

    easier to just TOP the main cola and low stress train the resulting nodes out with garden wire. this way you "spread" the plant like a

    spider, and each nodes gets max light, and max light = no wastage!

    Thinning. Penetration of cfl's is weak when compared to Hids, so to let the light penetrate in, selective thinning or pruning can help

    increase yields when some strains grow extra dense in the centre mass. i`ve flowered a 5 foot sativa (topped (twice)) under 1x 250w CFL, had

    buds grwing in the top 1-2 foot (it got lollypopped) and pulled almost 3 ounces including testers and serious noob errors. (she was thinned,

    topped,over pruned, over+under nuted, had spider mites-that got chemicaly nuked, 3 or 4 repots and 3 or 4 diff types of soil... but i

    digress.)

    Sea of green, Growing a perpetual sea of green with CFL's can bring excelent results with both yeild and time. using a mature "mother" plant

    for clones vegging seperately, and puting 5 or so clones into flower every 2 weeks str8 after rooting, in small deep pots (no bigger than

    1.5litre), each clone finaly pulling at LEAST 10g dry (18 inches max), will pull in on average 50g per 2 weeks. esp once you have "honed in"

    on your envoiroment and plants.

    P.C fans (4 inch & 6 inch) are great for air cooling the top of the canopy, and provide more than enough thru-flow to disperse any heat

    build-up and or stale air. a couple of passive intakes 4 inches square, and 1 or 2 P.C fans as extractors, is more than suitable to cool most

    Closed CFL grow spaces and cabs. again, a couple in the box to keep the air moving is great and can be as close as a few inches from the

    plant with zero fan burn.

    Red or blue. what colour light is it you have?, usualy it says on the box, and below are some of the standard names used.

    Warm/Red = 2700K
    Cool/Light white = 4150K
    Noon Sunlight= 5300K
    Blue CFL = 6100K
    Daylight white = 8500K

    If you are just thinking of using 1 colour for veg AND flower, try for red. if you HAVE to use a blue CFL for flowering its not the end of the world and great bud is possible

    you can see how to wire cfl's HERE>> http://www.thctalk.com/cannabis-foru...ghlight=wiring




    Cfls are a viable alternative for those with SMALLER spaces, Lighter Pockets, first time growers, supllimental lighting, and stealth boxes. use em and see how gr8 they are. (for copious amounts of bud)

    Hids are for those that can afford it and have the space. slightly better yields, want a quicker flowering period, (and copious amounts of bud and then some)
    Last edited by dj #; 09-01-10 at 01:02 PM.

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    gr8 post there m8 all so so true

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    great post can feel a sticky coming along soon

    medicine / bio-fuel / oxygen / building materials / proteins and essential oils/ plastics
    and textiles/ hygiene products / tree-less paper - and this is an ILLEGAL plant??
    name one other thing in this world that has all those benefits!

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    And you don't even need to use the compact versions as normal FL tubes have improved greatly in the last few years.

    If you can source them cheaply & have the room T5 FL tubes (like you get in shops/offices) can be used.

    BTW you may see U4, U6 & U8 when you look at CFL's and that refers to the number of times the tube has been bent into a U shape to fit the housing, an 8U lamp is actually 8 individual small tubes that have been bent over (to make it compact).

    A dual spec CFL will usually have half of its U's at 2700K the others at 6400K. this is also why a bulb is still usable if one U dies (as its effectively a seperate bulb).

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    Great thread mate, nice one.
    civilisations are like the little sparks that fly from a bonfire, winking into existance and being snuffed out as they confront their own particular obstacle.

    Abused and unloved bonfire plant

    POTM entry april 09

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    yes i think this thread is worthy of a sticky

    nice work there FaZedjb!
    "If i cant smoke and swear im F**KED!"
    http://www.thctalk.com/cannabis-forum/image.php?u=5246&type=sigpic&dateline=1249748262
    THCTalk recommends Greens Horticulture for all your growing needs
    if iv been of some help to you please take a second and press the thanks button, cheers

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    hi guys and girls .
    you say using the HOUSEHOLD CFL'S that YOU have, you can

    grow POTENT, MJ in a small box with just a few 20w CFLS and a couple of p.c fans.

    maybe a silly Q but what does CFL stand for ? also where could i get household cfls from in uk, (b an q ) or somewhere like that. Thanks

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    CFL = Compact Flourescent Light

    think energy saving lightbulbs

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    What a good read, thank you very much!
    Nuff respect,
    GanjaFarmer420

    Here have a listen to these two 420 tunes!
    http://www.youtube.com/watch?v=OEDkLuQEvaQ
    http://www.youtube.com/watch?v=64DpiVysXNI
    http://www.youtube.com/watch?v=WNhUUaK9JMc&feature=fvw

    Blueberry by Dutch Passion (125w CFL): http://www.thctalk.com/cannabis-foru...ad.php?t=18030
    12/12 Bagseed (CFL): http://www.thctalk.com/cannabis-foru...ad.php?t=18759
    Skunk #1 by Flying Dutchmen (CFL/HPS): http://www.thctalk.com/cannabis-foru...-%28CFL-HPS%29
    Amnesia Haze: (650w CFL): http://www.thctalk.com/cannabis-foru...post1068501353
    Soon to be doing Skunk No.1 again and some Bagseeds stayed tuned all - I'm back!

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    NIce read Fazedjb-nice grows on here aswell.
    'Daucus Carota Sativus'
    The holy grail......

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    If your using normal tubes or are getting standard bulbs then these reference numbers will come in handy...

    Numeric color code : Color Approximate : Colour Rendering Index : Color temperature (K)

    Halophosphate tubes
    27 : Warm white : 50–79 : 2700K
    33 : Cool white : 50–79 : 4100K
    83 : Medium warm white : 80 : 3000K
    84 : Cool white (high CRI) : 80 : 4100K

    Tri-phosphor tubes
    827 : Warm white : ~85 : 2700K
    835 : White : ~85 : 3500K
    841 : Cool white : ~85 : 4100K
    850 : Sunlight : ~85 : 5000K
    865 : Cool daylight : ~85 : 6500K
    880 : Skywhite : ~85 : 8000K

    Multi-phosphor tubes
    927 : Warm white : ~95 : 2700K
    941 : Cool white : ~95 : 4100K
    950 : Sunlight : ~98 : 5000K
    965 : Cool daylight : ~95 : 6500K

    So an 865 or 965 "Cool Daylight" could be used for Veg and 827 or 927 "Warm white" could be used for flower.

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    Good thread, a well needed one aswell, ive allways used CFL's

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    thanks for the support guys, CFL's are in a class of thier own and i wish they were as common 20 years ago!!

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    I found a useful site that has some technical papers on lighting system http://www.lrc.rpi.edu/programs/nlpip/index.asp

    There's even a page where it compares the efficiency to other light sources, its heavy reading but interesting.

    High Wattage CFL's
    http://www.lrc.rpi.edu/programs/nlpi...L/abstract.asp

    HID lamps
    http://www.lrc.rpi.edu/programs/nlpi...l/abstract.asp

    T5 tubes
    http://www.lrc.rpi.edu/programs/nlpi...5/abstract.asp

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    Quote Originally Posted by FaZedjb View Post
    thanks for the support guys, CFL's are in a class of thier own and i wish they were as common 20 years ago!!
    Nice one FZ for anyone growing 1 plant in a small place who wants quality weed cfl''''''''''''''''''''''''''''''''s are mutz nutz !!!!!!!!

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    Hmmnn I can get an 8000k CFL or two for free (from work) would they be ok to use? I see them in that list but I dont know if they'd be ok?

    I want to grow Cheese or Purple wreck ukel. but I dont want to burn their bollocks off, so which is the best for them and is it 8000k for Veg then 2500k for Flowering or wha?

    HIDs are prone to breaking if you touch the glass too cus their ghey! The oil in your skin causes a hot spot (I work around car spares especially halogen/HID bulbs and kits so I'm repeating my self with every customer xD)

  28. #17
    FZjb Guest

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    Quote Originally Posted by Puuurpl3-Chaos View Post
    Hmmnn I can get an 8000k CFL or two for free (from work) would they be ok to use? I see them in that list but I dont know if they'd be ok?

    I want to grow Cheese or Purple wreck ukel. but I dont want to burn their bollocks off, so which is the best for them and is it 8000k for Veg then 2500k for Flowering or wha?

    HIDs are prone to breaking if you touch the glass too cus their ghey! The oil in your skin causes a hot spot (I work around car spares especially halogen/HID bulbs and kits so I'm repeating my self with every customer xD)
    yes you are correct.

    Any CFL has grow potential. But, if you have the Room and cash, go HPS. if not CFL's are more than adequate.

    good luck.

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    Wicked thread... been a cfl grower for a few years now.

    Just about to take the plunge into HPS.... my new cupboard is 1.8m high by 0.6 width and 0.6 depth, got extraction and fan setup.....

    do you reckon thats a large enough space for a 400watt bulb.

    cause the space is tall and thin wanna grow upwards rather then outwards. two plants in 11lte square pots. My 300w CFL dual, which i cherish just cant penetrate through the canopy!

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    brilliant post cheers for all the info just startin first small grow using cfl
    rjd

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    Can someone recommend some good bulbs to use in this kind of setup? I've done a couple grows with normal household Phillips CFL's 11 - 23w. They alway's say on the box not to use with a timer so I end up having to do it manually, is it actually unsafe to use them with a timer? has anybody come accross any higher wattage ones that have a standard bayounet fitting and are safe to use with timers? I'm a paranoid fecker, cheers

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